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为研究Ti/Al_3Ti层状复合材料靶板在不同撞击时刻的损伤情况及失效形式,通过SPH-FEM模拟钨合金弹侵彻Ti/Al_3Ti层状复合材料靶板的过程,探讨其防护性能。模拟结果表明:在高速冲击载荷作用下靶板产生花瓣形开裂,伴随有不同程度的剥离;Al_3Ti层中出现径向沟槽状损伤裂纹,并出现部分脱落现象。Ti/Al_3Ti特殊的叠层结构使层间裂纹不断改变其扩展方向,发生裂纹偏转,增加裂纹扩展路径,使材料吸收更多的冲击能量,从而具有良好的装甲防护性能。
In order to study the damage and failure modes of Ti / Al_3Ti layered composite target at different impact moments, the process of penetrating Ti / Al_3Ti layered composite target by the SPH-FEM was simulated to investigate its protective performance. The simulation results show that the petal-shaped cracking of the target plate occurs with high-speed impact loading, with varying degrees of delamination. The radial groove-like damage cracks appear in the Al_3Ti layer with partial shedding. The special laminated structure of Ti / Al_3Ti makes the interlaminar cracks continuously change its expanding direction, the cracks are deflected and the crack propagation path is increased, so that the material absorbs more impact energy and thus has good armor protection performance.